Yeah, like what the others have said: Totally suspect. This plug-in does not do anything in Firefox. I tried Webex without the plug-in and the web app works fine after you give the proper permissions inside FF.

I later installed the plug-in after I was able to get Webex to work as stated above, and did not notice anything different. What gives?

**Update**
FYI you need to have WebRTC enabled for WebEx to work properly inside FF. I was having issues of not being able to select my computer's audio (it wasn't even showing up as an option) and I wasn't able to select/see my webcam until I enabled WebRTC.

It also seems like the plug-in was needed before December 2019 in order for Webex to work inside a web browser. I believe with the advance of Firefox and the likes along with the re-writing of the Webex code from Cisco's side, that this plug-in is rendered obsolete. But it still does not make sense as this plug-in was updated on June 1, 2020 at the time of this writing.